Displaying 20 results from an estimated 20000 matches similar to: "can't get summary() in loop"
2001 Mar 07
4
R.xpm?
I use AfterStep on Linux. I made an R.xpm file (attached)
and put this icon in the "wharf". To invoke R I click on the R icon.
I did not find an offical R.xpm, and so I am submitting this one
for your collective consideration....
The idea behind the icon is that it looks like a scatterplot, which is
"statistical". My main beefs with my R.xpm are that it doesn't have a
2000 Mar 21
5
par help wrong: xlog & ylog (PR#497)
Full_Name:
Version: 1.0.0
OS: linux
Submission from: (NULL) (193.62.250.209)
?par lists and describes xlog and ylog, though these are obsolete. It does not
list
log. I found out about log from ?plot.defaults--so that help is OK.
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2001 Mar 20
5
animation?
I was wondering if anyone out there has created a series of images (e.g.
jpegs) using R, then animated them on a web page. I have looked around a
bit and it seems fairly complicated. One approach that seems sensible is
to use a java script that displays the list of images. I have only used
html on web pages before so I don't know how to use java...
Ideally the final result is easily ported to
2000 Oct 09
4
lm question
I have not really used lm before and I was hoping for some help on a
simple problem.
Here is a toy version of the problem I want to solve.
y x grp
-.9 1 a
-.8 2 a
-.7 3 a
-.7 1.5 b
-.5 2.5 b
-.3 3.5 b
-.19 2.7 c
-.11 3.7 c
-.41 4.7 c
I want to fit a model that has one y-intercept and three slopes, one for
1999 Dec 13
3
t.test inside function (PR#373)
Full_Name: Bill Simpson
Version: 65.1
OS: linux
Submission from: (NULL) (193.62.250.209)
Try this code as separate lines entered interactively, then try doit()
doit<-function()
{
x<-seq(1,10)
y1<-x+rnorm(10,1,1.5)
y2<-x+rnorm(10,1,1)
t.test(x,y1,paired=TRUE)
t.test(x,y2,paired=TRUE)
}
doit() apparently executes only the last of a series of t.test()s.
Maybe this is no bug,
2000 Nov 17
2
hist() and density
There were some questions about hist() a couple of days ago which
triggered this post. My question/suggestion is about the y-axis in hist.
There are reasons to prefer making the y-axis density=relative
frequency/bin width. One reason is that the height of the plot does not
depend on the bin width; another is that if your histogram is in density
then you can easily superimpose a smooth theoretical
1999 May 11
1
dev.print help page (PR#191)
Full_Name: Bill Simpson
Version: 0.64.1
OS: linux
Submission from: (NULL) (193.62.250.209)
Two problems with dev.print help.
1. Under Examples:
dev.print(width=6, height=6, horizontal=F)
^ FALSE
2. dev.print help does not describe any of its parameters (e.g. height or
width).
Not described on the other dev.xxx pages either
2000 Feb 15
1
par: mar and mgp dead?
I just installed 99.0a, and I can't set mar and mgp:
> par(mar(2,2,.1,.1))
Error in par(mar(2, 2, .1, .1)) : couldn't find function "mar"
I had the same happen with mgp.
Are these bugs or a problem in my installation (everything else seems
OK)?
Is R core going to kill mar and mgp? If so, how should I fix the
huge margins and huge space between axis title and axis? Try this
1999 Nov 10
1
plot() bugs (PR#317)
Full_Name: Bill Simpson
Version: 65.1
OS: Linux Redhat 6.1
Submission from: (NULL) (193.62.250.209)
Try this:
#default plot symbols and lettering are too small, need to scale up
par(cex=2,mex=.7)
par(mar=c(5,5,1,1))
spdiff<-c(1,2,3,4,5)
dpdet<-c(1,2,3,4,5)/10
dpsp<-c(2,3,4,5,6)/10
dpdir<-c(2,4,6,8,10)/10
plot(spdiff,dpdet,pch=15,ylim=c(0,max(dpdet,dpsp,dpdir)),xlab="Speed
2001 Sep 13
1
sum overflow (PR#1091)
Full_Name: Bill Simpson
Version: 1.2.3
OS: linux
Submission from: (NULL) (193.62.250.209)
I think I have found an accuracy problem with sum()
> a<-1:1000
> b<-1:1000
>
> crossprod(a,a)*crossprod(b,b)
[,1]
[1,] 1.114448e+17
> drop(.Last.value)
[1] 1.114448e+17
>
#this should give same answer as above
> sum(a*a)*sum(b*b)
[1] -652010736
#seems to be due to
2001 Feb 20
4
wait for user input
I want to display a series of plots:
display plot 1
wait for user input (keypress or mouse click)
display plot 2
etc
How to do it? Thanks for any help.
(I have been using locator().)
Bill Simpson
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2000 Feb 21
2
read.table and factor
I have a data file like this:
std cf hit miss fa cr
920 980 40 15 14 31
950 1010 24 23 23 30
1190 1250 26 21 27 26
1010 1070 33 10 28 29
1040 1100 35 10 11 44
I use read.table to read it in. My problem is that read.table makes std
and cf into factors. I want them just
2001 Feb 19
2
problems sourcing in vs interactive
If I source in the function (see below) calib(), I get:
> source("papers/helle/threshold.r")
> calib()
Error in eval(expr, envir, enclos) : Object "energy" not found
But if I cut and paste the code for calib() one line at a time into the R
window it works fine.
calib<-function()
{
contrast<-c(.01,.02,.0325,.055,.0775,.1,.125,.15,.175,.2)
2001 Oct 08
3
testing diff for slopes and intercepts
I fit the model
fit<-lm(thresh~cond*Ne)
where
thresh is the reponse
cond is a factor with levels a, b, and c
Ne is a continuous indep var
I think of this full model as having three lines: thresh as a function of
Ne for each condition. Thus we have slopea, slopeb, slopec, inta, intb,
intc.
lm output my params
-------------------------
(Intercept) inta
condb intb - inta
condc
1999 Dec 13
1
pointsize?
A while ago there was a thread on graphics. I complained that the plots
produced by dev.print had symbols and fonts that were too small. I said
I had been using par(cex=2), but the advice was to use pointsize. I have
tried ps, is that what was meant?
par(ps=40)
x<-rnorm(100)
y<-rnorm(100)
dev.print(file="~/junk.ps", horizontal=FALSE)
No matter how big I make ps (40,60...), the
2001 May 29
2
Using "R" to find peaks in sampled data
This is probably a trivial question, but I did
not see it in the FAQs. Perhaps I simply need
to be pointed to some URLs.
In any case, I have some sampled data that has peaks,
and I would like to extract peak height, location, and
width, according to almost any statistical model.
Gaussian would seem to make the most sense.
There can also be "steps" increasing the amplitude
over a
2001 Jul 05
1
ERP software
I was just playing around with the R-streams package, reading in some data
from an old experiment we did here, and was again amazed by the flexibility
of the R environment. The eaze with wich I was able to generate simple plots
of my EEG data made me wonder if someone tried to implement an ERP package.
For the non-cognitive scientists ou there: EEG is electrical activity
measured from the scalp
2001 Oct 02
4
plot of Bernoulli data
I have some Bernoulli data something like this:
x<-sort(runif(100,1,20))
p<-pnorm(x,10,3)
y<-as.numeric(runif(x)<p)
plot(x,y)
lines(x,p)
This plot is not very satisfactory because the ogive does not visually
fit the (0,1) points very well, and also because the points tend to fall
on top of one another. The second problem can be eliminated by adding
vertical jitter. However I was
2000 Oct 17
1
filed plot symbols
This example,
x<-1:10
y1<-x
y2<-x+2
plot(x,y1,pch=21,ylim=range(c(y1,y2)),type="o",lty="solid",bg="white")
points(x,y2,pch=22,type="o",lty="dashed",bg="white")
legend(7,3,legend=c("y1","y2"),pch=c(21,22),lty=c("solid","dashed"),bg="white")
works if I use pch = one of 21-25. But
2000 Sep 18
5
layout question
I wanted to produce a layout like this:
|----------|
| |
| 1 |
| |
|-----------------------|
| | |
| 2 | 3 |
| | |
|-----------------------|
Three equal sized plots with the top one centred about the other two.
So far I am using
nf<-layout(matrix(c(1,1,2,3), 2, 2,